Coburn announced his retirement from professional hockey Friday.
Coburn, as expected, was a healthy scratch in the Islanders 4-3 overtime victory over the Penguins in the playoff opener.
Coburn has only played two games with the Islanders since being acquired at the trade deadline.
Coburn cleared the NHL's COVID-19 protocols and joined the Islanders for practice Wednesday, Andrew Gross of Newsday reports.
Ottawa traded Coburn to the Islanders in exchange for a 2022 seventh-round pick Sunday.
Coburn was reassigned to Ottawa's taxi squad Thursday.
Coburn has been promoted to the active roster and play Thursday against Toronto.
Coburn was assigned to the taxi squad Sunday.
Coburn was promoted to Ottawa's active roster Thursday, Bruce Garrioch of the Ottawa Sun reports.
Coburn was reassigned to the taxi squad Tuesday.